The allowable concentration level of vinyl chloride, C2H3Cl, in the atmosphere in a chemical plant is 2.0 x 10-6 g/L. a. How many moles of vinyl chloride in each liter does this represent?

Explanation:

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2CH3OH()+302(g) → 2C02(g) + 4H₂O(l) is the reaction which shows a chemical change producing a gas.

One or more chemicals change into one or more other chemicals in a chemical reaction. A chemical reaction is the transformation of one or more substances, known as reactants, into one or more new substances, known as products. Chemical components or compounds make up substances. For instance, rust is created when iron and oxygen combine. When vinegar and baking soda are combined, sodium acetate, carbon dioxide, and water are the results. things igniting or detonating.

There are five types of chemical reaction that occur generally, they are

Single displacement, double displacement, combustion, combination or synthesis, and decomposition.

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The total bond energy of the reaction is - 183 kJ/mol and the reaction is exothermic.

The given reaction,

N₂ + O₂ → 2NO

Total bond energy ΔH of the reaction can be calculated by using the formula,    

ΔH = Total bond energy of the reactants - Total bond energy of the products

Here the bonds between N₂ and O₂ are broken,

Energy of broken N₂ and O₂ bond = 1443 KJ/mol

The bonds formed are NO,

Energy of the formed NO bond = 1260 KJ/mol

Total bond Energy ΔH,

ΔH = 1260 - 1443 KJ/mol

ΔH = -183 KJ/mol

As we can see that the value of ΔH is negative. In thermodynamics, if the value total bond energy comes out to be negative then it means that the system is liberating heat and that is why the reaction is said to be exothermic.

So, the Total bond energy of the reaction is -183KJ/mol and the reaction is exothermic.

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3D view of H3O+

The stronger line means that the Hydrogen is closer to us in a 3D view, meanwhile the line with traces, or you cal also see as a weaker line, it means that the Hydrogen is farther from us in a 3D view

Lewis Structure of H3O+

The concentration of Na⁺ ions in the final solution will be 0.33 M

Volume of Na₂SO₄ = 100 ml

Volume of NaCl = 200 ml

Molarity of Na₂SO₄ = 0.200 M

Molarity of NaCl = 0.300 M

Concentration of Na⁺ ions =?

We will calculate the number of moles of Na+ ions as

    number of mole of Na⁺ in Na₂SO₄ = 0.100 L (2 × 0.200 mol Na₂SO₄ / L × 1 mol Na⁺ / 1 mol Na₂SO₄)

    number of mole of Na⁺ in Na₂SO₄ = 0.04 mol Na⁺

    number of mole of Na⁺ in NaCl = 0.200 L × 0.3 mol NaCl / L × mol Na⁺ / 1 mol NaCl

    number of mole of Na⁺ in NaCl = 0.06 mol Na⁺

Now calculate the total volume

    total volume = (0.100 + 0.200) L

    total volume = 0.300 L

Finally, calculate the concentration    

    Concentration of Na⁺ = (0.04 + 0.06) mol Na+ / 0.300 L

    Concentration of Na⁺ = 0.33 M

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Answer:

C - 1.58 × 10^−7 M

Explanation:

The hydroxide ion concentration can be found from the pOH by the reverse mathematical operation employed to find the pOH. [OH-] = 10-pOH or [OH-] = antilog ( - pOH) Page 2 Example: What is the hydroxide ion concentration in a solution that has a pOH of 5.70? On a calculator calculate 10-5.70, or "inverse" log (- 5.70).

The concentration of hydronium ion C) - 1.58 × 10^−7 M

                                     ∴pH=6.80

The hydroxide ion concentration can be found from the pOH by the reverse

To calculate the pH of an aqueous solution we need to know the concentration of the hydronium ion in moles per liter (molarity).

The pH is then calculated using the expression:

pH = - log [H3O+]

       -log[6.80]

       - 1.58 × 10^−7 M

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The pressure inside the container is 3.25 × 10⁴ Pa.

The ideal gas law, which connects a gas's pressure, volume, temperature, and molecular weight:

PV = nRT

We are given the volume of the container (50 L = 0.050 m³), the number of moles of oxygen gas (1.41 mol), and the temperature (473 K). We can rearrange the ideal gas law to solve for the pressure:

P = nRT/V

Plugging in the values we get:

P = (1.41 mol) × (8.31 J/(mol·K)) × (473 K) / (0.050 m³)

P = 3.25 × 10⁴ Pa

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Answer:

Buffalo and Watertown.

Explanation:

This is correct as the Interior lowlands are located ib the US. These are correct as the others are in the US but aren't located anywhere near the Interior Lowlands.

It's O2 which is oxygen....

Answer:

Explanation:

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Answer:

It uses fossils to help pinpoint the ages of rocks.

Explanation:

Radiocarbon  dating can not be used  to determine the age of rocks.

Carbon dating works well only for objects that are less than 50,000 years.  Most rocks are far older than that. Over time, carbon-14 decays gradually  into nitrogen. Hence, we can not really use radiocarbon dating to determine the absolute age of a rock sample since the carbon-14 in the fossils of ancient rock samples may have completely decayed.

The observation, in this case, is quantitative.

Quantitative observations are observations that can be recorded based on quantitative data. In other words, they are observations that can be assigned numerical values.

Quantitative observations are as opposed to qualitative observations because the former cannot be assigned numerical values. They can be ranked or qualified.

In this case, Danielle and Heather could assign numbers to the length, width, and height of the tank in order to calculate its volume.

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\(XeF_{4}\) is a non-polar molecule

Because \(XeF_{4}\) has a symmetrical geometrical structure, it is square planar.

The dipoles across the Xe-F bond cancel each other out, resulting in a zero net dipole. As a result, the \(XeF_{4}\) molecule has a homogeneous charge distribution with no polarisation.

Polarity refers to the distribution of electric charge within a molecule or compound.

If the distribution of electrons is symmetrical, the molecule is nonpolar.

If the distribution of electrons is asymmetrical, the molecule is polar.

The polarity of a molecule is determined by the difference in electronegativity between the atoms in the molecule, with the atom having the higher electronegativity having a partial negative charge and the atom having the lower electronegativity having a partial positive charge.

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Answer:

food chain

Explanation:

it is transferring energy from one molecule to another in a food form

The attractive forces between the particles in a liquid determine the equilibrium vapor pressure of the liquid. Explanation: In a liquid, the particles are in constant motion, and they attract each other due to the intermolecular forces. As a result of the attraction forces, a few of the molecules at the surface have enough energy to break free of the liquid's attractive forces and become vapor molecules.

The equilibrium vapor pressure is the pressure exerted by the vapor molecules above the liquid surface in a closed container when the rate of vaporization equals the rate of condensation.

In other words, when the rate of liquid molecules becoming gas is equal to the rate of gas molecules becoming liquid, then a system is said to be at equilibrium.

The liquid will continue to evaporate and condense, but the number of particles in each phase will remain constant in a closed system. The temperature and strength of intermolecular forces in the liquid determine the vapor pressure of a liquid.

Stronger forces will require a higher temperature for evaporation to occur, leading to a lower vapor pressure, while weaker forces will allow for a higher vapor pressure.

Therefore, the stronger the attractive forces between the particles in a liquid, the lower its equilibrium vapor pressure.

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Answer:

stoichiometry

Explanation:

The study of quantitative relationships between the amounts of reactants used and the amounts of products formed by a chemical reaction is called stoichiometry.

Stoichiometry is a branch of chemistry that deals with the quantitative relationships between the reactants and products in a chemical reaction. It is based on the law of conservation of mass, which states that mass is neither created nor destroyed in a chemical reaction.

The study of stoichiometry is important because it allows us to predict how much of a product will be formed in a chemical reaction. This information can be used to design and scale up chemical reactions and to determine the efficiency of a chemical process.

A mixture of He Ne and N2 gases has a pressure of 1. 943 atm if the pressure of He and Ne are 0. 137 atm and 0. 566 atm respectively.  The partial pressure of N2 in the mixture is 1.240 atm.

To find the partial pressure of N2 in the mixture of He, Ne, and N2 gases having a pressure of 1.943 atm with the pressure of He being 0.137 atm and that of Ne being 0.566 atm, we must first calculate the pressure of N2.

Let's assume the pressure of N2 in the mixture is Pn2.

Since the total pressure is equal to the sum of partial pressures of gases, we can write:

Ptotal = PHe + PNe + PN2 (equation 1)

We have the values for Ptotal, PHe, and PNe from the problem, which are 1.943 atm, 0.137 atm, and 0.566 atm respectively.

Substituting the values of Ptotal, PHe, and PNe in equation 1, we get:

Pn2 = Ptotal - PHe - PNe

Pn2 = 1.943 atm - 0.137 atm - 0.566 atm

Pn2 = 1.240 atm

Therefore, the partial pressure of N2 in the mixture is 1.240 atm.

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Answer:

Light receptors within the eye transmit messages to the brain, which produces the familiar sensations of color. Newton observed that color is not inherent in objects. Rather, the surface of an object reflects some colors and absorbs all the others. We perceive only the reflected colors.

When balancing the reaction \(C_{15}H_{32}\) + \(O_2\) → \(CO_2\) + \(H_2O\), the coefficient for \(O_2\) is 46 to ensure an equal number of oxygen atoms on both sides of the equation. In the reaction Fe(s) + \(CuCl_2\)(aq) → \(FeCl_2\)(aq) + Cu(s), copper (Cu) is the element that undergoes reduction, transitioning from a positive oxidation state to its elemental form.

To balance the chemical equation \(C_{15}H_{32}\) + \(O_2\) → \(CO_2\)+ \(H_2O\), we need to ensure that the number of atoms of each element is equal on both sides of the equation.

Starting with the carbon atoms, we have 15 on the left side and only 1 on the right side. To balance this, we place a coefficient of 15 in front of CO2: \(C_{15}H_{32}\) + \(O_2\) → 15\(CO_2\) + \(H_2O\).

Moving on to the hydrogen atoms, we have 32 on the left side and only 2 on the right side. To balance this, we place a coefficient of 16 in front of H2O: \(C_{15}H_{32}\) + \(O_2\) → 15\(CO_2\) + 16\(H_2O\).

Finally, we balance the oxygen atoms. On the left side, we have 2 oxygen atoms from the \(O_2\) molecule, and on the right side, we have 30 oxygen atoms from the 15 \(CO_2\) molecules and 16 oxygen atoms from the 16 \(H_2O\) molecules.

Hence, the total number of oxygen atoms on the right side is 46. Therefore, the coefficient for \(O_2\) in the balanced equation is 46.

In the reaction Fe(s) + \(CuCl_2\)(aq) → \(FeCl_2\)(aq) + Cu(s), the element that is reduced is Cu.

Reduction is defined as the gain of electrons, and in this reaction, copper (Cu) goes from a positive oxidation state in \(CuCl_2\)(aq) to an elemental form with a zero oxidation state (Cu(s)).

This change indicates that copper has gained electrons and has been reduced. Iron (Fe) remains in the same oxidation state throughout the reaction, so it is not reduced.

Chlorine (Cl) is not reduced either because it remains bonded to copper in \(FeCl_2\)(aq) and maintains its oxidation state.

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a) Carbon dioxide can be dissolved in the blood on the right side of heart.

b) Carbon dioxide

c) Oxygen-rich blood flows from the lungs to the left atrium.

8)  Circular Motion

9)Valves

10. Ventricular septum

11)  Higher altitudes have fewer oxygen molecules per volume of air.

One carbon atom is covalently double linked to two oxygen atoms in each of the compounds that make up carbon dioxide, which has the molecular formula CO2. At ambient temperature, it exists as a vapour.

In the atmosphere, carbon dioxide serves as a greenhouse gas because it captures infrared energy despite being invisible to visible light. It has increased from pre-industrial values of 280 ppm to a minor gas in the Earth's atmosphere at 421 parts per million (ppm), or approximately 0.04% by volume (as of May 2022).

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A) Medium I. Determine which medium is most likely space or vacuum. The sound was produced from an airhorn and was measured 30 meters away while traveling through various mediums. According to the data, the medium that most likely corresponds to space or vacuum is medium I.  A) Medium I.

Medium I is the medium that is most likely space or vacuum as per the given data. The properties of space are similar to those of a vacuum as it is a region with no matter. Therefore, sound waves cannot propagate through space since they require a medium to transfer energy. Sound waves are composed of mechanical waves, which require a material medium to propagate.

They can travel through gases, liquids, and solids. The speed of sound varies in different mediums, which could have been one of the factors that helped to determine the medium.

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Answer:

d = 9.5× 10⁻⁴ Kg/cm³

Explanation:

Given data:

Length of cube = 1.02 cm

Mass of cube = 0.001012 Kg

Density of cube = ?

Solution:

The length , height and width of cube is always same. Thus the volume of cube is,

Volume = length × height× width

Volume = 1.02 cm × 1.02 cm × 1.02 cm

Volume = 1.06 cm³

Density of cube:

d = 0.001012 Kg /1.06 cm³

d = 9.5× 10⁻⁴ Kg/cm³

The percent composition of salicylic acid is C7H6O3, or 60.87%C, 4.4%H, and 34.75%O

Answer: 558.5545 g

Explanation:

The formula for a sulphate ion is \(\text{SO}_{4}^{\text{ }2-}\), so the formula for copper sulphate is \(\text{CuSO}_{4}\).

This means the formula mass of copper sulphate is:

So, in 3.5 moles, the mass is (159.587)(3.5)=558.5545 g

Carbon-12 (or 12C) contains six protons, six neutrons, and six electrons; therefore, it has a mass number of 12 amu (six protons and six neutrons). Carbon-14 (or 14C) contains six protons, eight neutrons, and six electrons; its atomic mass is 14 amu (six protons and eight neutrons).

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The functions of copper and zinc are they act as the positive electrode and negative electrode respectively.

The functions of copper and zinc in the system with the wire connecting the Zn to the nail are as follows:

1. Copper acts as the positive electrode or the cathode in the system. It attracts the electrons from the zinc, which is the negative electrode or the anode.

2. Zinc acts as the negative electrode or the anode in the system. It loses electrons to the copper, which is the positive electrode or the cathode.

3. The wire connecting the zinc to the nail allows for the flow of electrons from the zinc to the copper. This creates an electric current, which is what powers the system.

In summary, the copper and zinc in the system with the wire connecting the Zn to the nail act as the positive and negative electrodes, respectively, and allow for the flow of electrons and the creation of an electric current.

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Answer:

B   proofread the message.

Explanation: Hope this helped